Bolt anchor



May"5, 1925 -c. c. TOMKINSON BOLT ANCHOR Original Fil d'Aug- 1 1921 0'.da z,

INVENTOR (Zar/es (T yam/K0750,

-Reis'sued May 5, 1925.

NITE STATES PATENT OFFICE.

CHARLES C. TQMKINSON, OF PLAINFIELD, NEW JERSEY, A SSIGNOR T JOHN EDWARDY OGDEN, 0F MOUNTAINVILLE, NIEV YORK. v

BOLT ANCHOR.-

Original Ho.-1,487,290,.dated March 18, 1924, Serial No. 491,333, filedAugust 11, 1921. Application for reissue filed Octoberll, I924. SerialNo. 744,293.

To all'whom it may concern:

Be it known that I, (HIARLES C. TOMKIN- son,

resident of Plainfield, countyof Union, and

Stateof New Jersey, United States of America, have mvented certain newand useful Improvements in Bolt Anchors, of

which the following is aspecificatio'n.

4 This invention relates to Bolt Anchors such as are used in walls ofbrick, stone, cementitious or other material not adapted to directlyreceive a threaded member.

. 4 One of the objects of thev invention is to.

provide an anchor having hard and soft metal parts so constructed and.arranged that the hard metal parts will. be deformed and expanded by thesoft metal into engagement with t-he wall of the opening in which theanchor is located.

' One of the objects of the invention is to provide an anchor metalparts-so arran ed that the soft metal will be forced throng openings inthe hard metal int-o en agement with the wall of the opening in a ditlonto expanding the hard metal.

Another .object of the invention is to provide an anchor comprising ahard metal shell and asoft metal expanding element,

the. shell having means for assisting in directing the movement of thesoft metal when the latter is pressed or acted onby a thread member orbolt.

' Another object of the invention is to provide a new and improvedmethod of securing an expansion shield in a 'wall opening and securinganobject to. be supported to the shield.

Further objects of'the invention will apear from the followingspecification taken 1n connection with the drawings, which form a partof this application, and in whichi Fig. 1 is an elev atlonal View of anexpansion shield constructed in accordance with theinvention,

Fig. 2 is an and elevation of the outer end of the shield-shown. in Fig.1.

Fig. 3 is a sectional elevation taken substantially on line- 3-3 of Fig.1.

Fig. 4 is a sectional elevation of the shield shown in Fig. 1

-Fig. Bis a transverse sectional view a citizen ofjthe United States,and ahaving hard and soft of the shield is constructed to takensubstantially on line 5-5 of Fig. 4. Fig. 6 is a sectional elevation ofa shield shown in Fig. 1, but taken at right angles to the section shownin Fig. 4

Fig. 7 is a sectional elevation of the bolt anchor showing the anchor inexpanded position in an opening or wall.

' Fig. 8 is a transverse sectional elevation 5 taken substantially online 88 of Fig. 7

Fig. 9 is a sectional elevation of the con- I struction shown in Fi 7,but taken substantially at right ang es to Fig. 7.

Fig. 10 is an elevation. of another form of shield constructed inaccordance with the invention, and

Fig. 11 is a transverse sectional elevation takensubstantia'lly on line11- -11 of Fig. 10.

The invention may be briefly described as comprising a one piece shieldof relatively tween the bottom and body portion and to or bolt and passoutwardly in the openings between the connectingmembers. ,In particularform of the invention shown, the bottom is conical in shape therebydirecting the flow of the metal which is acted on by the bolti' Theshield is alsowardly projecting lugs or preventing rotation of theshield.

rovided with outthe Like characters of reference desi ate correspondingparts in all views 0 the drawings.

The shield constructed in accordance withinvention comprisesa bodyportion 20,

III a bottom 21 and deformable strips 22 which connect the-body portionto the bottom. A plurality of lugs 23 is formed on the outer wall of thebody portion 20 and thw I prevent the rotation of the shield in t e wallopening. The bottom 21 has an inner surface 24 conical in shape, or,expressed in other words, the surface 24 forms an acute.

angle with the inner wall of the shield for a purpose hereinafter setforth.

'lhe otherend of the shield has a threaded into the shield, the innerend of the bolt will engage the soft metal filler 26 and Will force thefiller laterally through the openings 27 between the strips 22 and thismovement of the soft metal will also deform the strips 22 forcing themlaterally into engagement with the wall opening as shown. particularlyin Fig. 9. This flow of the soft metal is directed and assisted by theconical bottom surface 24.

In Figs. 10 and 11 another form of the invention is shown andin thisform each of the strips 22 has formed thereon one' or more outwardlyextending ribs 29 and when the strips 22 are deformed the ribs.

will be pressed into firm and tight engagement with the wall openingthereby assisting inretaining the shield in place.

From the above description, it will be seen that an exceedingly firmand-secure anchorage may be obtained by utilizing the constructiondescribed and furthermore that the construction is simple, practical andcomprises few parts.

Although certain specific embodiments of the invention havebeenillustrated and described, it will be understood that the invention iscapable of further modification and that changes in the construction andin the arrangement of the various cooperating parts may be 'made withoutdeparting from the spirit or scope of the invention. as expressed in thefollowing claims.

lVhat I claim is: c

1. An anchor comprising a one piece expansion shield of relatively hardmetal and having expansible elements and an expanding element consistingof a mass of relatively soft metal positioned within said shield, andsubstantially filling the space between said expansible elements.

2. An anchor comprising a one piece expansion shield of relatively hardmetal and having expansible elements and. perforations and an expandingelement of relatively soft metal positioned within said shield andadapted to expand said elements and to extend through the perforations.

An anchor comprising a one piece ex pansion shield of relatively hardmetal and having expansible elements, an expanding element of relativelysoft metal positioned within said shield, and means for directing theflow of the soft metal laterally as the expanding element is compressed.

4. An anchor comprising a ,one piece exshield for directing the flow ofthe soft metal laterally as the expanding element is compressed.

5. In an anchor, a shield having a closed bottom, spaced stripsconnecting the bottom to the body of the shield and a soft metalexpanding element positioned in the shield adjacent the bottom andsubstantially filling the shield within the strips.

6. In an anchor, a shield having a closed bottom, spaced stripsconnecting the bottom to the bod of the shield, a, softmetal expanding eelnent positioned in the shield adjacent the bottom and substantiallyfilling the shield within the strips, and means carried by the bottom ofthe shield for directing the soft metal laterally through the spacesbetween the strips and against the strips as the soft metal element iscompressed.

7 In an anchor, a shield having a closed bottom, spaced stripsconnecting the bottom to the body of the shield and a soft metalexpanding elementpositioncd in the shield adjacent the bottom andsubstantially filling the shield within the strips, said bottom havingan inwardly extending conical surface for directing the soft metallaterally as the expanding element is compressed.

8. A perforated expansion shield having .a closed bottom provided with asurface inclinedto the wall of the shield.

9. A one piece perforated expansion shield having a closed bottomprovidedwith a surface inclined to the wall of the shield.

10. A one piece expansion shield having spaced, longitudinal, deformablestrips, and a soft metal mass disposed adjacent to and adapted to deformsaid strips. 4

11. In combination. a one piece expansion shield having spaced,longitudinal, deformable strips, and a soft metal, expanding element inthe shield and adapted to deform the strips. v

12. A one piece expansion shield of relatively hard metal comprising abody portion, a closed bottom and a plurality of spaced longitudinalstrips connecting the body portion to the bottom.

13. A one piece expansion shield of relatively hard metal comprising abody 'portion, a bottom and a pluralityof spaced longitudinal stripsconnecting the body portion to the bottom, said bottonrhav-in aninwardly extending portion having sur aces forming an acute angle withthe Wall of the shield.

14. A one piece expansion shield. having a closed bottom and havingperforations in the wall adjacent the bottom, the bottom having an innersurface formin an acute in the wall adjacent the bottom, the bottomhaving a conical inner surface 16. A one piece expansion shield ofrelatively hard metal comprising a body portion, a closed bottom and aplurality of spaced, lon itudinal, ribbed strips connecting the b yportion to the bottom.

17. A one piece expansion shield of relatively hard metal comprising abody portion, a closed bottom and a plurality of spaced, longitudinalstrips connectingthe body portion to the bottom, said strips hav ingtransverse outwardly. projecting portions. I

18. An anchor comprising a one iece expansion shield of relatively harmetal. having a threaded bolt-receivln portion and having expansibleelements and an expanding element of relatively soft metal positionedwithin said shield and transversely filling the space between saidexpa-nsible elements.

19. An anchor comprising a one pansion shield of relatively har metal,having a bolt receiving opening and having expansible elements and anexpanding element consisting of a mass of relatively soft metalextending across the path of a bolt positioned in the bolt receivingopening.

20. An anchor comprising a one piece expansion shield of relatively hardmetal having a threaded opening for receiving a bolt and haying lateralopenings and an expanding element of relatively soft metal disposed inthe path of movement of a bolt positioned in the threaded opening and ina position to pass through the lateral openings.

21. An anchor comprising a one iece expansion shield of relatively harmetal, having a bolt receiving opening and a closed end opposite saidopenin and having expansible elements and an eizpanding elementconsisting of a mass of relatively soft metal disposed in said closedend and in the bolt receiving opening. 1

22. In an anchor, a shield having a closed bottom and lateral openingsadjacent the bottom and a soft metal expanding element positioned in theshield adjacent the bottom.

v 23. 'In an anchor, a shield having a closed bottom and lateralopenmgs'and expansible portions adjacent the bottom and a soft comression an piece ex-- metal expanding element positioned in thc shieldadjacent the bottom.

24. The method of securing a fastening to a wall, ceiling or othersupport consisting in inserting the fastening in the hole in the Wall,ceilingor other support, pressing a compressible substance. locatedwithin the fastening against an expanding member located in thefastening to force openings in the fastening by both compression andwedging action and into binding contact with the walls of the hole, andthen securing the object to be supported to the fastening so held in thehole.

25. The method of securing a fastening to a wall, ceiling or othersupport consisting in inserting the fastening in the hole in the wall,ceiling or other support, presing a compressible substance locatedwithin the fastening against a wedge located in the fastenin to force(portions of the compressible su tance ra ially in two directionsthrough openin in'the fastening by both wedging action and into bin ingcontact with the walls'of the'hole, and then securing the object to besupported to the fastening so held in the hole.

26. The method of securing a substantially rigid expansion bolt to awall, ceiling or other su port consisting in inserting the substantial yri 'd expansion bolt in the hole in the wall, ceiling or other support,pressing a compressible substance located within the substantially rigidexpansion bolt against an expanding member located in thesubstantiallyrigi d expansion bolt, to force portions of thecompressible substance radially through openings' in the substantiallyrigid expansion bolt by both compresion and wedging action, and intobinding contact with'ithe walls of the hole backfrom the surface of saidwall or other support, and then securing the object to be supported tothe substantially rigid expansion bolt.

27. A new article of manufacture comprising an expansion bolt having ahollow perforated portion adapted to extend into a hole and means tosupport a bolt or screw, compressible material mounted within the hollowperforated portion, and adapted to be forced radially through theperforations to make a bond or grip with a wall or other suitablesupport.

In witness whereof, I have hereunto set myhand this th day of October,1924.

CHARLES C. TOMKINSON.

ortions of the compressible substanceradia ly through

